Quote: (Originally Posted by
EBT)

...and this isnt a criticism. Above 6m I run any ccr as pure o2. If you feel a change in bouyancy/hear the adv fire, you know you have an issue.
I do the same...I actually dont even carry diluent in the pool when on CC..only O2 is plumbed into the rig. As an aside...this makes it easy to let folks try-dive the unit in the pool as well since there is so little that could go wrong.